package com.dq.Week3.day13.map;

import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;

public class HashMapDemo03 {
    public static void main(String[] args) {
        HashMap<String,Object> mainInfo = new HashMap<>();
        mainInfo.put("sender","Gitee");
        mainInfo.put("title","aabbcc");
        mainInfo.put("sendDate",new Date());
        mainInfo.put("receiver","yjs");
        System.out.println(mainInfo);

        HashMap<String, Object> mainInfo1 = new HashMap<>();


    }
}
